THIS is where you were either being dishonest or lazy. This is kicking a rock and trying to refute an idealist. I had a friend, many years ago, who started hallucinating things. Scared the hell out of him. You're claiming the fact that he SAW the hallucinations is what? Evidence that they were real? Doesn't work that way.
When you "see" a person, there are infinite models of reality that are consistent with what your eyes tell you: the person may be real; they may be a bit of software code; an experience fed to your mind; a part of a very vivid dream, etc. The fact that you are getting visual sense-data is not evidence for ANY of these possibilities, because the sense-data fits consistently with ALL possibilities, and you either knew this, or should have known this.
You also missed the obvious theist objection that God may not be the sort of thing one experiences with their senses anyway, so lack of "Godly" sense-data would not be a detriment to theism on that argument alone.
Those atheists are wrong. Reality is either theistic (God or Gods) or atheistic. Atheists can't disprove God and theistic evidence is far from compelling (mostly personal stuff I talked about before, though I still like the fine-tuning argument). In the absence of any evidence for or against, a proposition must be given an agnostic value (.5). That is hardly a "minute probability" for theism.
Now, the same thing could be said about the existence of unicorns (or anything that's not a logical contradiction). Either they exist or they don't. We have no evidence for or against, so again an agnostic position should be taken. I think what you were trying to say is that the question of the existence of God is as trivial as the existence of unicorns or teacups orbitting the moon.
I don't think that's true. For thousands of years, people have not been talking about, and killing each other over, and devoting their lives to the study of whether unicorns or orbitting tea cups exist and what their properties are. People have a fascination with God, and the technical definition of atheism itself proves it is a non-trivial discussion. Atheism is defined as a disbelief in God(s) (though some atheist circles have a more robust definition of the term). Not teacups or fairies or unicorns. Atheism and theism are flip-sides of the same coin.